This is the regular Stock GoPro 4 Black.
As to post processing.....
I shoot with pro tune on, so I bring it into GoPro Studio, where I convert the file to a QuickTime file. At that step, you can also remove the fish eye effect.
Next step is to use the same software to assemble the typically 2 clips from the single flight and apply the pro tune filter, and some other mild Colorado correction. In the case of that film, I just used the protune filter and a little added exposure.
Shooting with Protune produces a flat image, so adding the post processing is required. If you want to shoot with it turned off, you could save some time, but I like the image, and on my computers, which are not your average computers, does the conversion on a 1:1 or real time basis.
Hope this helps!